6G5-11372-1S Yamaha Bypass Cover 115HP | Genuine Used Part
6G5-11372-1S Yamaha Bypass Cover 115HP | Genuine Used Part
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🔧 Product Description
Genuine Yamaha Cooling-Water Bypass Cover No. 2 - Part Number: 6G5-11372-00-1S
A genuine used Yamaha bypass cover for selected V4 and V6 two-stroke outboard cooling systems.
The cover seals a cooling-water bypass passage in the cylinder block or crankcase assembly, allowing regulated coolant circulation during warm-up and normal engine operation.
⚙️ Key Features
- Genuine used Yamaha cooling-system cover
- Correct part number 6G5-11372-00-1S
- Factory description: Cover, Bypass 2
- Used on selected 115HP and larger V4 / V6 engines
- Original cast-aluminium Yamaha component
🚤 Compatibility
Commonly used on
- Yamaha V4 and V6 two-stroke cooling-water bypass systems
- Cylinder-block and crankcase cooling passages
Typically suits
- Engine models:
- Yamaha 115HP two-stroke
- Yamaha C115 two-stroke
- Yamaha 130HP two-stroke
- Yamaha 150HP V6 two-stroke
- Yamaha 175HP V6 two-stroke
- Yamaha 200HP V6 two-stroke
- Yamaha 225HP V6 two-stroke
- Engine diagrams specifying bypass cover 6G5-11372-00-1S
- HP Range: Approximately 115HP - 225HP
- Engine Type: Yamaha carburetted, EFI and selected HPDI V4 / V6 two-stroke outboard
- Year Range: Model and serial-number dependent
🔌 Function
The cover seals the cooling-system bypass cavity and helps direct cooling water through the correct block and cylinder-head passages.
⚠️ Common Signs of Failure
- Cooling water leaks around the cover
- Cover is cracked or heavily corroded
- Mounting surface is distorted
- Gasket repeatedly fails
- Cooling-system pressure is lost
- Salt deposits restrict the bypass passage
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 6G5-11372-00-1S → Supersedes 6G5-11372-00-5B
- 6G5-11372-00-5B earlier painted OEM reference
- 6G5-11372-00-9M related earlier colour reference
OEM / Related Numbers
- 6G5-11372-00-1S
- 6G511372001S
- 6G5-11372-00-5B
- 6G511372005B
- 6G5-11372-00-9M
- 6G5-11372
- Related bypass-cover gasket as specified by engine model
Aftermarket / Verified Equivalents
- No aftermarket equivalent
📦 Condition
- Genuine used part
- Removed from running engine where applicable
- In good working condition unless otherwise stated
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in the condition you received it for a refund or exchange. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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